Method for manufacturing magnetic recording medium and magnetic recording and reproducing apparatus

Abstract

A method for manufacturing a magnetic recording medium (30) having magnetically separate magnetic recording patterns on at least one surface of a nonmagnetic substrate (1), includes the steps of forming a magnetic layer (2) on the nonmagnetic substrate, forming a mask layer (3) on the magnetic layer, forming a resist layer (4) on the mask layer, transferring negative patterns of the magnetic recording patterns to the resist layer using a stamp (5), removing portions of the mask layer which correspond to the negative patterns of the magnetic recording patterns, implanting ions in the magnetic layer from a resist layer-side surface to partly demagnetize the magnetic layer, and removing the resist layer and the mask layer. A magnetic recording and reproducing apparatus includes the above magnetic recording medium (30), a driving section (11) that drives the magnetic recording medium in a recording direction, a magnetic head (27) including a recording section and a reproducing section, a device (28) for moving the magnetic head relative to the magnetic recording medium, and recording and reproducing signal processing device (29) for inputting a signal to the magnetic bead and reproducing an output signal from the magnetic head.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is an application filed under 35 U.S.C. §119(e)(1) of the filing date of Japanese Patent application No. 2006-318839 filed Nov. 27, 2006 pursuant to 35 U.S.C. §111(b).TECHNICAL FIELD[0002]The present invention relates to a method for manufacturing a magnetic recording medium for use in a hard disk drive and the like, and a magnetic recording and reproducing apparatus.BACKGROUND ART[0003]The application range of magnetic recording drives, such as magnetic disk drives, flexible disk drives and magnetic tape drives, has recently been significantly extended, making these magnetic recording drives more important. For magnetic recording media used in these drives, efforts have been made to markedly improve recording density. In particular, since the introduction of an MR head and a PRML technique, surface recording density has been further significantly increased. In recent years, a GMR head and a TMR head have also been introdu...

AI Technical Summary

Benefits of technology

[0030]The present invention can provide a magnetic recording medium manufactured by forming the magnetic recording patterns after forming the magnetic layer on the nonmagnetic substrate, the magnetic recording medium enabling the stability of head floating to be ensured, having an excellent capability of separating the magnetic recording patterns from one another, preventing the possible adverse effect by the interference between signals from the adjacent patterns, and offering an excellent recording density property. The present invention can also eliminate the need for the following steps from the magnetic layer processing method, which has been considered to be very complicated: a step of removing the magnetic layer by dry etching, a subsequent burying step, and a subsequent step of re-burying etched-away portions to form a film. This contributes significantly to enhancing the productivity.

[0031]Furthermore, the magnetic recording and reproducing apparatus in accordance with the present invention uses the magnetic recording medium in accordance with the present invention. The present invention thus provides a magnetic recording and reproducing apparatus having an excellent head floating property, having an excellent capability of separating the magnetic recording patterns from one another, and preventing the possible adverse effect by the interference between signals from the adjacent patterns, thus offering an excellent recording density property.

Problems solved by technology

The latest magnetic recording drives have a track density of as much as 110 kTPL However, increasing the track density is disadvantageously likely to cause magnetically recorded data in adjacent tracks to interfere with each other.

This leads directly to a decrease in bit error rate, hindering the enhancement of the recording density.

However, a reduction in the size of recording bits may disadvantageously decrease the minimum magnetization volume per bit, resulting in heat fluctuation.

However, this may disadvantageously make it difficult to obtain sufficient reproduction outputs and to thus ensure a sufficient SNR.

Unfortunately, the medium is thus prone to be contaminated during the manufacturing process, which is very complicated.

However, the film formed takes over the recess and protrusion shapes formed on the substrate, preventing the stabilization of the floating posture and height of a recording and reproducing head performing the recording and reproducing operations while floating over the medium.

However, the inter-track regions formed by this method offer reduced saturation magnetization but increased coersive force.

Consequently, an insufficient magnetization state remains, resulting in blurring when information is written on the magnetic track portion.

However, even with this method, disadvantageously, the magnetic recording medium may be contaminated during the manufacturing process.

Furthermore, the smoothness of the surface may be degraded.

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